#include "socketstream.h"

namespace base {

	SocketStream::SocketStream(AsyncSocket* socket) : socket_(NULL) {
		Attach(socket);
	}

	SocketStream::~SocketStream() {
		delete socket_;
	}

	void SocketStream::Attach(AsyncSocket* socket) {
		if (socket_)
			delete socket_;
		socket_ = socket;
		if (socket_) {
			socket_->SignalConnectEvent.connect(this, &SocketStream::OnConnectEvent);
			socket_->SignalReadEvent.connect(this,    &SocketStream::OnReadEvent);
			socket_->SignalWriteEvent.connect(this,   &SocketStream::OnWriteEvent);
			socket_->SignalCloseEvent.connect(this,   &SocketStream::OnCloseEvent);
		}
	}

	AsyncSocket* SocketStream::Detach() {
		AsyncSocket* socket = socket_;
		if (socket_) {
			socket_->SignalConnectEvent.disconnect(this);
			socket_->SignalReadEvent.disconnect(this);
			socket_->SignalWriteEvent.disconnect(this);
			socket_->SignalCloseEvent.disconnect(this);
			socket_ = NULL;
		}
		return socket;
	}

	StreamState SocketStream::GetState() const {
		ASSERT(socket_ != NULL);
		switch (socket_->GetState()) {
		case Socket::CS_CONNECTED:
			return SS_OPEN;
		case Socket::CS_CONNECTING:
			return SS_OPENING;
		case Socket::CS_CLOSED:
		default:
			return SS_CLOSED;
		}
	}

	StreamResult SocketStream::Read(void* buffer, size_t buffer_len,
		size_t* read, int* error) {
			ASSERT(socket_ != NULL);
			int result = socket_->Recv(buffer, buffer_len);
			if (result < 0) {
				if (socket_->IsBlocking())
					return SR_BLOCK;
				if (error)
					*error = socket_->GetError();
				return SR_ERROR;
			}
			if ((result > 0) || (buffer_len == 0)) {
				if (read)
					*read = result;
				return SR_SUCCESS;
			}
			return SR_EOS;
	}

	StreamResult SocketStream::Write(const void* data, size_t data_len,
		size_t* written, int* error) {
			ASSERT(socket_ != NULL);
			int result = socket_->Send(data, data_len);
			if (result < 0) {
				if (socket_->IsBlocking())
					return SR_BLOCK;
				if (error)
					*error = socket_->GetError();
				return SR_ERROR;
			}
			if (written)
				*written = result;
			return SR_SUCCESS;
	}

	void SocketStream::Close() {
		ASSERT(socket_ != NULL);
		socket_->Close();
	}

	void SocketStream::OnConnectEvent(AsyncSocket* socket) {
		ASSERT(socket == socket_);
		SignalEvent(this, SE_OPEN | SE_READ | SE_WRITE, 0);
	}

	void SocketStream::OnReadEvent(AsyncSocket* socket) {
		ASSERT(socket == socket_);
		SignalEvent(this, SE_READ, 0);
	}

	void SocketStream::OnWriteEvent(AsyncSocket* socket) {
		ASSERT(socket == socket_);
		SignalEvent(this, SE_WRITE, 0);
	}

	void SocketStream::OnCloseEvent(AsyncSocket* socket, int err) {
		ASSERT(socket == socket_);
		SignalEvent(this, SE_CLOSE, err);
	}


}  // namespace base
